CA1058098A - Gas filter - Google Patents
Gas filterInfo
- Publication number
- CA1058098A CA1058098A CA263,699A CA263699A CA1058098A CA 1058098 A CA1058098 A CA 1058098A CA 263699 A CA263699 A CA 263699A CA 1058098 A CA1058098 A CA 1058098A
- Authority
- CA
- Canada
- Prior art keywords
- walls
- wall
- filter
- folds
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Separating Particles In Gases By Inertia (AREA)
- Filtering Materials (AREA)
- Air Bags (AREA)
Abstract
Abstract of the disclosure An extensible gas filter comprises three perforated walls with parallel folds, interconnected along alternate folds to allow accordion-like folding of the filter to a maximum value corresponding to the developed length of the shortest third wall, the walls defining chambers with staggered perforations forming a gas-deviating baffle.
Description
~5~
GAS FILTER
;
The invention rela~es to extensible gas filters.
A known gas filter described in U.S~ pat. 3 075 337 comprises two walls having parallel folds, connected along certain of said folds to define therebetween chambers while allowlng extension of the filter in the manner of an accordion.
Perforations in each said wall are staggered in relation to those of the other wall for the passage of gas through said chambers along a sinuous path.
- The invention concerns a gas filter of this type which j 10 is characterized in that it ~rther comprises a perforated third wall having folds parallel to those of the first two walls and being connected to the assembly of the ~irst two walls, in the regions where the first two walls are connected, with its perforations staggered in relation to those of at least one of the flrst two walls, said third wall having a developed length substantially less than thle maximum length to which the assembly of the first two walls alone could be extended and limiting the extension of the filter to said developed length, and hence to an efficient value, less than said maximum.
The accompanying drawings show, by ~ay of example, an embodiment and variation-~ of the gas filter accordiny to the invention. In the drawing:
Fig~ a partlal view in transverse cross-section of an embodiment of gas filter, Fig. 2 is a cut-away plan view corresponding to Fig. 1, and to a smaller scale, Fig. 3 is an end view of a variation of the filter, 5~
F'ig. 4 is a view similar to Fig. 3~ showing fittiny of the varied ~ilter in a working position, and Fig. S is a view similar to Fig. 4, but showing a second variation.
The filter shown ln Figs~ 1 and 2 comprises two walls 1, 2 forming therebe~ween chambers 3. These walls have parallel folds 4, 5 for wall 1, and 6, 7 for wall 2. These two walls are connected together, for example by sticking, along alternate ~olds S, 7. The assembly formed of walls 1 and 2 is thus extensible in the manner of an accoxdion. The wall 1 has per-forations 8 aligned as shown in Fig. 2, and wall 2 has per-~orations 9 also aligned as shown on Fig. 2. The perforations 8 and 9 are offset so that air penetrating per~orations 9 i5 obliged to ~ollow a sinuous path in the chambers 3 to reach perforations 80 This corresponds to the known structure cited at the outset.
In addition to these known elements, the filter shown has a thlrd wall 10 having folds 11, 12 parallel to the folds 4-7 of walls 1 and 2. This third wall 10 has per~orations 13 aligned ~ , as shown on Flg. 2 and offsat in relation to the perforations 9 of the ad~acent wall 2. ~his staggering, which was lateral and longitudinal between per~orations 8 and 9, is here substantially longltudinal, in the direction of the folds, in relation to perforations 9 and 8. The staygering must simply be such that the air which passed khrough the baffle formed by the walls 1 and 2 is ~irstly obliged to ~ollow a sinuous path in the space between walls 2 and 10.
, .
~5~9~
~ The wall 10 is fixed to the assembly formed by the walls : 1 and 2 by its folds 12, fixed to the united folds 7/5. This third wall has, as shown on Fig. 1, a developed length notably less than the maximum to which the walls 1 and 2 could other-; wise be extended. The purpose of this arrangement is to ensure ; that when the filter is put in place and extend~d, the third , wall 10 limits the extension of the filter to an efficient value and notably less than the maxlmum value to which the walls 1 and 2 could otherwise be extended.
:~ .
An advantage of the third wall 10 is to ensure regular folding out of the filter and, consequently, a greater effi-ciency thereof. Moreover, when the filter is placed in the working position, the third wall 10 prevents it being stretched in an excessive manner detrimental to its efficiency, while allowing the user to give to the filter the maximum admissible extension corresponding to the maximum possible extension of this t~rd wall~ Moreover, the presence of the third wall 10 increases the efficiency of the filter by making the air pass therein along a more sinuous path than in the case where there are only two walls.
In the variation according to Figs. 3 and 4, one of the walls of the filter, for example a thlrd wall 21, has a width (measured in the dlrection of the ~olds) greater than that of the two other walls. The protruding part of this largex wall 21 is designated on Fig. 3 by 14. When this filter is put in ; place for operation~ by disposlng it between two parallel, facing U-shaped sections 15, 16 (Fig. 4), the protruding part s~
is crushed in ~he upper section 15, as indicated at 17, to ~orm a joint. In another variation r it would be possible to provide two symmetrlcal projecting parts such as 14, which : -would provide a joint in the upper section 15 and a simllar joint in the lower section 16. This symmetrical construction would avoid the need to take care, when the filter is being put in place, that the projecting part is upwards.
In the variation of Fig. 5, an extenslble fllter 20 is engaged in a ventilation opening 18 of a wall 19 with its third wall 21 larger than the ~irst two in a manner to protrude upwardly and downwardly as indicated at 22 and 23. These pro- :
~ecting parts are applied against the wall 19 to provide a ~ .
~oint along the edges of the f1lter.
'.
., .
.. '
GAS FILTER
;
The invention rela~es to extensible gas filters.
A known gas filter described in U.S~ pat. 3 075 337 comprises two walls having parallel folds, connected along certain of said folds to define therebetween chambers while allowlng extension of the filter in the manner of an accordion.
Perforations in each said wall are staggered in relation to those of the other wall for the passage of gas through said chambers along a sinuous path.
- The invention concerns a gas filter of this type which j 10 is characterized in that it ~rther comprises a perforated third wall having folds parallel to those of the first two walls and being connected to the assembly of the ~irst two walls, in the regions where the first two walls are connected, with its perforations staggered in relation to those of at least one of the flrst two walls, said third wall having a developed length substantially less than thle maximum length to which the assembly of the first two walls alone could be extended and limiting the extension of the filter to said developed length, and hence to an efficient value, less than said maximum.
The accompanying drawings show, by ~ay of example, an embodiment and variation-~ of the gas filter accordiny to the invention. In the drawing:
Fig~ a partlal view in transverse cross-section of an embodiment of gas filter, Fig. 2 is a cut-away plan view corresponding to Fig. 1, and to a smaller scale, Fig. 3 is an end view of a variation of the filter, 5~
F'ig. 4 is a view similar to Fig. 3~ showing fittiny of the varied ~ilter in a working position, and Fig. S is a view similar to Fig. 4, but showing a second variation.
The filter shown ln Figs~ 1 and 2 comprises two walls 1, 2 forming therebe~ween chambers 3. These walls have parallel folds 4, 5 for wall 1, and 6, 7 for wall 2. These two walls are connected together, for example by sticking, along alternate ~olds S, 7. The assembly formed of walls 1 and 2 is thus extensible in the manner of an accoxdion. The wall 1 has per-forations 8 aligned as shown in Fig. 2, and wall 2 has per-~orations 9 also aligned as shown on Fig. 2. The perforations 8 and 9 are offset so that air penetrating per~orations 9 i5 obliged to ~ollow a sinuous path in the chambers 3 to reach perforations 80 This corresponds to the known structure cited at the outset.
In addition to these known elements, the filter shown has a thlrd wall 10 having folds 11, 12 parallel to the folds 4-7 of walls 1 and 2. This third wall 10 has per~orations 13 aligned ~ , as shown on Flg. 2 and offsat in relation to the perforations 9 of the ad~acent wall 2. ~his staggering, which was lateral and longitudinal between per~orations 8 and 9, is here substantially longltudinal, in the direction of the folds, in relation to perforations 9 and 8. The staygering must simply be such that the air which passed khrough the baffle formed by the walls 1 and 2 is ~irstly obliged to ~ollow a sinuous path in the space between walls 2 and 10.
, .
~5~9~
~ The wall 10 is fixed to the assembly formed by the walls : 1 and 2 by its folds 12, fixed to the united folds 7/5. This third wall has, as shown on Fig. 1, a developed length notably less than the maximum to which the walls 1 and 2 could other-; wise be extended. The purpose of this arrangement is to ensure ; that when the filter is put in place and extend~d, the third , wall 10 limits the extension of the filter to an efficient value and notably less than the maxlmum value to which the walls 1 and 2 could otherwise be extended.
:~ .
An advantage of the third wall 10 is to ensure regular folding out of the filter and, consequently, a greater effi-ciency thereof. Moreover, when the filter is placed in the working position, the third wall 10 prevents it being stretched in an excessive manner detrimental to its efficiency, while allowing the user to give to the filter the maximum admissible extension corresponding to the maximum possible extension of this t~rd wall~ Moreover, the presence of the third wall 10 increases the efficiency of the filter by making the air pass therein along a more sinuous path than in the case where there are only two walls.
In the variation according to Figs. 3 and 4, one of the walls of the filter, for example a thlrd wall 21, has a width (measured in the dlrection of the ~olds) greater than that of the two other walls. The protruding part of this largex wall 21 is designated on Fig. 3 by 14. When this filter is put in ; place for operation~ by disposlng it between two parallel, facing U-shaped sections 15, 16 (Fig. 4), the protruding part s~
is crushed in ~he upper section 15, as indicated at 17, to ~orm a joint. In another variation r it would be possible to provide two symmetrlcal projecting parts such as 14, which : -would provide a joint in the upper section 15 and a simllar joint in the lower section 16. This symmetrical construction would avoid the need to take care, when the filter is being put in place, that the projecting part is upwards.
In the variation of Fig. 5, an extenslble fllter 20 is engaged in a ventilation opening 18 of a wall 19 with its third wall 21 larger than the ~irst two in a manner to protrude upwardly and downwardly as indicated at 22 and 23. These pro- :
~ecting parts are applied against the wall 19 to provide a ~ .
~oint along the edges of the f1lter.
'.
., .
.. '
Claims (3)
1. A gas filter of the type comprising two walls having parallel folds, connected along certain of said folds to define therebetween chambers while allowing extension of the filter in the manner of an accordion, and perforations in each said wall staggered in relation to those of the other wall for the passage of gas through said chambers along a sinuous path, characterized in that it further comprises a perforated third wall having folds parallel to those of the fist two walls and being con-nected to the assembly of the first two walls, in the regions where the first two walls are connected, with its perforations staggered in relation to those of at least one of the first two walls, said third wall having a developed length substan-tially less than the maximum length to which the assembly of the first two walls alone could be extended and limiting the extension of the filter to said developed length.
2. A filter according to claim 1, in which all three walls have the same number of folds.
3. A filter according to claim 1, in which one of its walls protrudes from the others along at least one of the edges of the filter perpendicular to the folds.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1578375A CH594437A5 (en) | 1975-12-04 | 1975-12-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1058098A true CA1058098A (en) | 1979-07-10 |
Family
ID=4411898
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA263,699A Expired CA1058098A (en) | 1975-12-04 | 1976-10-19 | Gas filter |
Country Status (12)
Country | Link |
---|---|
US (1) | US4008060A (en) |
JP (1) | JPS5827968B2 (en) |
AT (1) | AT364739B (en) |
BE (1) | BE847277A (en) |
CA (1) | CA1058098A (en) |
CH (1) | CH594437A5 (en) |
DE (1) | DE2558659C3 (en) |
DK (1) | DK144694C (en) |
FR (1) | FR2333554A1 (en) |
GB (1) | GB1507422A (en) |
NL (1) | NL7612306A (en) |
SE (1) | SE409419B (en) |
Families Citing this family (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2949235A1 (en) * | 1979-12-07 | 1981-06-11 | Johann 4630 Bochum Oleszak | VENTILATION CEILING |
US4321064A (en) * | 1980-09-24 | 1982-03-23 | Vargo John W | Filter apparatus and method of filtering |
US4555342A (en) * | 1982-06-28 | 1985-11-26 | Grant Blake F | Ribbon filter apparatus |
JPS59154318U (en) * | 1983-03-30 | 1984-10-16 | 伸晃金属工業株式会社 | Filter for removing exhaust oil, etc. |
GB8707482D0 (en) * | 1987-03-28 | 1987-04-29 | Bink Bullows Ltd | Gas filter |
US5236480A (en) * | 1989-01-05 | 1993-08-17 | Camfil Ab | Air filter for workstations and methods of making and using such air filter |
US5002597A (en) * | 1989-04-03 | 1991-03-26 | Invent Ag | Aerodynamic filter |
CH678154A5 (en) * | 1989-04-26 | 1991-08-15 | Robert Andreae | |
US5064453A (en) * | 1989-11-30 | 1991-11-12 | International Air Filter, Inc. | Air filter system |
US5306332A (en) * | 1991-05-14 | 1994-04-26 | Air-Gonomics, Inc. | Columnar filtering unit for spray painting |
DE4128062C2 (en) * | 1991-08-23 | 1997-02-06 | Knecht Filterwerke Gmbh | Pleated, flexible filter material with pleat spacers |
GB9311768D0 (en) * | 1993-06-08 | 1993-07-28 | Andreae Erhard C | A gas filter element |
DE4344505C2 (en) * | 1993-12-24 | 2002-09-19 | Mahle Filtersysteme Gmbh | Filter element folded in a zigzag shape |
GB2305138B (en) * | 1996-09-26 | 1997-08-13 | Erhard Charles Andreae | Gas filter |
DE29720876U1 (en) * | 1997-11-25 | 1999-04-01 | Mann & Hummel Filter | Filter element |
US6328778B1 (en) | 1999-04-01 | 2001-12-11 | Andreae Filters, Inc. | Filter apparatus |
NL1014250C2 (en) * | 2000-02-01 | 2001-08-02 | Holdingmij Rupofil B V | Filter element, e.g. for removing fat or paint from air, comprises top and bottom webs with exit opening surface area larger than inlet opening surface area |
NL1014251C2 (en) * | 2000-02-01 | 2001-08-02 | Holdingmij Rupofil B V | Filter element, e.g. for removing fat or paint from air, comprises top and bottom webs with inlet and exit openings on opposite sides of flow channel symmetry axis |
NL1014249C2 (en) * | 2000-02-01 | 2001-08-02 | Holdingmij Rupofil B V | Filter element, e.g. for removing fat or paint from air, comprises top and bottom webs with inlet and exit openings with specifically defined maximum axial dimensions |
US6585793B2 (en) * | 2000-12-29 | 2003-07-01 | Andreae Filters, Inc. | Filter apparatus and methods |
JP2002339221A (en) * | 2001-03-13 | 2002-11-27 | Toyoda Spinning & Weaving Co Ltd | 3-d nonwoven fabric and method for producing the same |
US6699348B2 (en) | 2001-04-13 | 2004-03-02 | Camfil Ab | Method for filter fabrication |
JP2007117945A (en) * | 2005-10-31 | 2007-05-17 | Nippon Rokaki Kk | Filter device |
US7585345B2 (en) * | 2006-01-19 | 2009-09-08 | Phillips Plastics Corporation | Baffle filter |
US7452396B2 (en) * | 2006-03-01 | 2008-11-18 | Honeywell International Inc. | Collapsible auto expanding media filter |
US7931723B2 (en) * | 2006-03-09 | 2011-04-26 | Donaldson Company, Inc. | Filter assembly with pleated media pockets, and methods |
US7947123B2 (en) * | 2006-11-10 | 2011-05-24 | Illinois Tool Works Inc. | Impact filter with grease trap |
JP5762325B2 (en) * | 2012-01-30 | 2015-08-12 | 三菱日立パワーシステムズ株式会社 | Exhaust gas treatment equipment |
US9375664B2 (en) | 2012-06-13 | 2016-06-28 | Maxitrol Company | Filter assembly |
WO2014145502A2 (en) | 2013-03-15 | 2014-09-18 | Columbus Industries, Inc. | Paint booth filter |
US9993835B2 (en) | 2013-04-05 | 2018-06-12 | Columbus Industries, Inc. | Industrial coating application filter with pleated support |
US9555358B2 (en) | 2013-04-05 | 2017-01-31 | Columbus Industries, Inc. | Industrial coating application filter with pleated support |
JP2016014381A (en) * | 2014-07-03 | 2016-01-28 | ナブテスコ株式会社 | Vehicular air compression device |
EP3015297B2 (en) * | 2014-10-29 | 2022-09-14 | Carl Freudenberg KG | Assembly with a filter element |
JPWO2018025473A1 (en) * | 2016-08-01 | 2019-05-30 | ソニー株式会社 | Projection display device and filter structure |
ES2954075T3 (en) | 2017-01-27 | 2023-11-20 | Columbus Ind Inc | Industrial coating application filter with pleated support |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3075337A (en) * | 1959-06-24 | 1963-01-29 | Baumgartner Papiers Sa | Gas filter |
US3259352A (en) * | 1965-06-22 | 1966-07-05 | Conco Engineering Works Inc | Loading balancer assembly |
US3744222A (en) * | 1970-12-16 | 1973-07-10 | A Delao | Corrugated board paint filter |
JPS4819663U (en) * | 1971-07-16 | 1973-03-06 |
-
1975
- 1975-12-04 CH CH1578375A patent/CH594437A5/xx not_active IP Right Cessation
- 1975-12-30 DE DE2558659A patent/DE2558659C3/en not_active Expired
-
1976
- 1976-01-26 GB GB2842/76A patent/GB1507422A/en not_active Expired
- 1976-02-05 SE SE7601283A patent/SE409419B/en not_active IP Right Cessation
- 1976-02-09 US US05/656,141 patent/US4008060A/en not_active Expired - Lifetime
- 1976-10-14 BE BE171509A patent/BE847277A/en not_active IP Right Cessation
- 1976-10-19 DK DK471576A patent/DK144694C/en active
- 1976-10-19 CA CA263,699A patent/CA1058098A/en not_active Expired
- 1976-10-26 FR FR7632253A patent/FR2333554A1/en active Granted
- 1976-11-03 AT AT0814976A patent/AT364739B/en not_active IP Right Cessation
- 1976-11-05 NL NL7612306A patent/NL7612306A/en not_active Application Discontinuation
- 1976-11-06 JP JP51133694A patent/JPS5827968B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE847277A (en) | 1977-01-31 |
SE7601283L (en) | 1977-06-05 |
SE409419B (en) | 1979-08-20 |
DE2558659A1 (en) | 1977-06-16 |
DE2558659B2 (en) | 1977-10-06 |
ATA814976A (en) | 1981-04-15 |
US4008060A (en) | 1977-02-15 |
AT364739B (en) | 1981-11-10 |
FR2333554B1 (en) | 1981-06-12 |
JPS5269067A (en) | 1977-06-08 |
AU1067276A (en) | 1977-08-04 |
DK144694B (en) | 1982-05-17 |
CH594437A5 (en) | 1978-01-13 |
JPS5827968B2 (en) | 1983-06-13 |
GB1507422A (en) | 1978-04-12 |
DK144694C (en) | 1982-10-25 |
DK471576A (en) | 1977-06-05 |
DE2558659C3 (en) | 1978-06-08 |
FR2333554A1 (en) | 1977-07-01 |
NL7612306A (en) | 1977-06-07 |
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